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| Titel |
Observations in equatorial anomaly region of total electron content enhancements and depletions |
| VerfasserIn |
N. Dashora, R. Pandey |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 23, no. 7 ; Nr. 23, no. 7 (2005-10-14), S.2449-2456 |
| Datensatznummer |
250015320
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| Publikation (Nr.) |
 copernicus.org/angeo-23-2449-2005.pdf |
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| Zusammenfassung |
A GSV 4004A GPS receiver has been operational near the crest of
the equatorial anomaly at Udaipur, India for some time now. The
receiver provides the line-of-sight total electron content (TEC),
the phase and amplitude scintillation index, σφ and
S4, respectively. This paper presents the first results on the
nighttime TEC depletions associated with the equatorial spread F
in the Indian zone. The TEC depletions are found to be very well
correlated with the increased S4 index. A new feature of low-latitude
TEC is also reported, concerning the observation of
isolated and localized TEC enhancements in the nighttime low-latitude ionosphere. The TEC enhancements are not correlated with
the S4 index. The TEC enhancements have also been observed
along with the TEC depletions. The TEC enhancements have been
interpreted as the manifestation of the plasma density
enhancements reported by Le et al. (2003).
Keywords. Ionosphere (Equatorial ionosphere; Ionospheric
irregularities) |
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